Main.cc: In function ‘int main()’:
Main.cc:8:9: warning: unused variable ‘n’ [-Wunused-variable]
    8 |     int n, a, b;
      |         ^
Main.cc:16:13: error: expected ‘}’ at end of input
   16 |     return 0;
      |             ^
Main.cc:6:1: note: to match this ‘{’
    6 | {
      | ^